分析:(1)6.54×101變成6.54×(100+1),利用乘法的分配律變成6.54×100+6.54×1計(jì)算簡便;
(2)0.25×0.97×40利用乘法的結(jié)合律變成(0.25×40)×0.97計(jì)算簡便;
(3)45.3×101-45.3利用乘法的分配律變成45.3×(101-1)計(jì)算簡便;
(4)0.89×4.8+0.89×5.2利用乘法的分配律變成0.89×(4.8+5.2)計(jì)算簡便.
解答:解:(1)6.54×101,
=6.54×(100+1),
=6.54×100+6.54×1,
=654+6.54
=660.54;
(2)0.25×0.97×40,
=(0.25×40)×0.97,
=10×0.97,
=9.7;
(3)45.3×101-45.3,
=45.3×(101-1),
=45.3×100,
=4530;
(4)0.89×4.8+0.89×5.2,
=0.89×(4.8+5.2),
=0.89×10,
=8.9.
點(diǎn)評:考查了運(yùn)算定律與簡便運(yùn)算,四則混合運(yùn)算.注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算律簡便計(jì)算.